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@uiten gratta stent @frn N. C'. CLARK, yOF LOW MOOR, IOWA.

Letters Patent No. 74,503, dated February 18, 1868.

IMPROVBD WELL-BORING IJPARAIIIS.V

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TO ALL WHOM IT MAY CONOERN:

-Be it known that 4I, N. C. CLARK, of Low Moor, in the county of Clinton, and State of Iowa, have invented ii new and useful Improvement in Well-Boring Apparatus; and I do hereby declare that the following is .a full, clear, and exact description thereof, which will enable those skilled in thc art to make and use the saine, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a perspective View of my improved well-boring apparatus.

Figure 2 is a detail sectional view of the same, taken through the line n: x, iig. 1 Y

Similar letters of reference indicate corresponding parts. v

My invention has for its object to furnish a simple, effective, and convenient apparatus for well-boring; and it consists in 'the construction and combination of the various parts of the apparatus as hereinafter more fully described.

Ais the frame of the apparatus, consisting of a head-block, al, supported upon three or more inclined'legs, a2, so as to give it stability when in use. ,VB is the windlass, the axles of which'- revolve in bearings attached' to two of the legs a2, as shown'in iig. 1. C are cranks, attached to the'projectiug ends of the windlass orshaft B, to operate the. said shaft. D is a rope, one end of which is attached to the shaft B. The repel) passes over the pulley N, pivoted to the upper part of the frame A, and toits other `end is attached a ring, d', through which the auger-stem passes, so that the auger may be raised and lowered by operating the shaft B. Eis the auger, which is made in two parts, nearly semicircular in form, the part of each upon which the lip is formed projecting a little in front of theother. The parts ofthe auger atth-eir centre are securely lfastened-to a short bar or nut, el, having a hole through its `centre, with a screw-thread out in it, fitting into a screw-thread cut upon the lower part of the stern F-just above the point G. lTo the parts of the bits or auger upon which the lips are not formed are hinged small plates, H, which shut down over the lips and prevent the slush, dirt, or`\` sand from escaping from the auger while being raised. I is a rim or hand, which rests upon therauger E, being kept in place by ears, c2, formed upon the edges of the auger E, and whielrserves as a bucket4 for raising the sand, dirt, and slush. G is a steel point, upon the base or upper part of which a screwthread is cut ttng'iinto a screw-thread cut in the inner surface ofthe lower end of the stein F, so that the said point may be removed, when desired, for sharpening, or' for clearing out the vent-holes of the stem. F is an iron stem, which is made hollow, and is open at the top, as shown in figs. 1 and 2, and has four holes,`more or lessi, formed through its sides, above the upper end of thepoint Cr and below the auger E, so that when the auger is beingraised the air may pass through the stem and intol the space below the auger, to allow the said auger to'be draw'n up with more ease. The upper end of the hollow iron stein Fis rigidly connected to the lower end of the wooden stem J, so that `the auger may be revolved by the revolution ofthe stem J. The stem passes up through al hole in the centre of the headlblock al, and may be extended to any desired length by coupling additional parts or pieces, as K, to it, the adjaeentfends being secured to each other by a band or splice, L, as shown in igs. 1 and 2. The auger is revolved or worked by means of a lever; M, passed 4through holes in the stem, as shown in fig. 1. i

I claim as new, and desire to secure by 'Letters Patent- The combination of the hollow perforated stem F and a detachable point, G, with the extensible rod o1" stem J, auger E, valves H, and shell or casing I, all constructed and arranged to operate in the manner and for the purpose set forth.

N. C. CLARK.

Witnesses:

WM. N. Sinni", A. J. Covert. 

